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A preparation method of high-strength, high-conductivity and high-plasticity pure copper rod

A technology of high plasticity and rods, which is applied in the field of non-ferrous metals and plastic processing and forming, can solve the problems that pure copper rods cannot have high strength, high conductivity and high plasticity at the same time, and achieve good plasticity, broad application prospects, The effect of high density

Inactive Publication Date: 2016-04-06
恒吉集团杰诺康铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of high-strength, high-conductivity and high-plasticity pure copper rod, which solves the problem that the pure copper rod obtained by the existing preparation method cannot have high strength, high conductivity and high plasticity at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The method for preparing high-strength, high-conductivity and high-plasticity pure copper rods of the present invention is to fill copper powder with a purity greater than 99% and a particle size of 2-100 μm into an extrusion die, and apply 5-10×10 through an extruder. 5 Pre-compact with the pressure of N, maintain the pre-compact pressure, heat the extrusion die and copper powder to 360~450℃ and keep it for 10~15min, finally control the extrusion ratio to 8~25:1 and the temperature to 360~450 ℃, extruded to form a bar, that is, a pure copper bar with high strength, high conductivity and high plasticity is obtained.

[0016] The preparation method of the high-strength, high-conductivity and high-plasticity pure copper rod of the present invention is to directly form a rod with a copper powder with a purity greater than 99% and a particle size of 2-100 μm through a low-temperature hot extrusion molding technology. With the characteristics of high density, high density, high ...

Embodiment 1

[0019] Put copper powder with a purity of more than 99% and a particle size of 40-50μm into a Ф50mm extrusion die, and apply 8×10 through an extruder 5 The pressure of N is used for pre-compacting, maintaining the pre-compacting pressure, heating the extrusion die and copper powder together to 385°C and keeping the temperature for 10 minutes, and finally controlling the extrusion ratio to 9.18:1 and the temperature to 385°C to form a bar. A pure copper rod with Ф16.5mm is obtained.

[0020] After inspection and testing, the pure copper bar prepared in Example 1 has a density of 99.1%, UTS=276.2MPa, YTS=255MPa, Elongation=22.2%, reduction of area ψ=52.6%, conductivity of 100% IACS, and hardness It is 50.7HBW.

Embodiment 2

[0022] Put copper powder with purity greater than 99% and particle size of 4~5μm into a Ф50mm extrusion die, and apply 10×10 through the extruder 5 The pressure of N is used for pre-compacting, maintaining the pre-compacting pressure, heating the extrusion die and copper powder together to 385°C and keeping the temperature for 10 minutes, and finally controlling the extrusion ratio to 9.18:1 and the temperature to 385°C to form a bar. A pure copper rod with Ф16.5mm is obtained.

[0023] After inspection and testing, the pure copper bar prepared in Example 2 has a density of 99.0%, UTS=305.8MPa, YTS=280MPa, Elongation=23.8%, reduction of area ψ=43.5%, conductivity of 94.8%IACS and hardness It is 53.9HBW.

[0024] The pure copper bar prepared in Example 2 was subjected to aging heat treatment (temperature of 200°C, holding time of 12h), and its density was 99.0%, UTS=314.1MPa, YTS=300MPa, Elongation=22.7%, and the reduction of area ψ =48.8%, conductivity is 94.8%IACS, hardness is 53...

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Abstract

The invention discloses a preparation method of a high-strength, high-conductivity and high-plasticity pure copper bar. Copper powder is loaded into an extrusion mould, and is pre-tightened through pressure exerted by an extruder, the pressure for pre-tightening is maintained, the extrusion mould and the copper powder are together heated to 360 to 450 DEG C, and then the temperature is kept for 10 to 15 min, finally the bar is formed through extrusion, namely, the high-strength, high-conductivity and high-plasticity pure copper bar is obtained. According to the preparation method of the high-strength, high-conductivity and high-plasticity pure copper bar, the copper powder with the purity being higher than 99 percent and the particle size of 2 to 100 mum is directly made into the bar through a low-temperature hot extrusion and formation technology. The copper bar has the characteristics of high purity, high density, high intensity and high plasticity, and due to excellent properties, the pure copper bar has a wide application prospect in the field of conductive and heat conducting functional materials or structural materials.

Description

Technical field [0001] The invention belongs to the field of non-ferrous metals and plastic forming, and in particular relates to a method for preparing high-strength, high-conductivity and high-plasticity pure copper rods. Background technique [0002] Pure copper has high electrical and thermal conductivity, high plastic deformation ability, and good corrosion resistance. As a good conductor, it is widely used in industry. However, although pure copper has the advantage of high conductivity, its tensile strength is extremely low, usually only 120-160MPa. In addition, pure copper has high plastic deformation ability, but because of its extremely low static recrystallization temperature characteristics, it is easy to work hardening, thereby inhibiting further plastic deformation. Therefore, pure copper materials are mostly used in wires, conductors, coolers, etc., and it is difficult to meet the needs of various applications as structural materials. [0003] Studies have shown th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/20B22F5/12
Inventor 徐春杰陈利萍田军代盼梁淑华
Owner 恒吉集团杰诺康铜业有限公司